US 12,338,670 B2
Overhead door operator system
Magnus Abrahamsson, Loddekopinge (SE); and Anton Hansson, Kivik (SE)
Assigned to Assa Abloy Entrance Systems AB, Landskrona (SE)
Appl. No. 17/928,981
Filed by Assa Abloy Entrance Systems AB, Landskrona (SE)
PCT Filed Jun. 17, 2021, PCT No. PCT/EP2021/066339
§ 371(c)(1), (2) Date Dec. 1, 2022,
PCT Pub. No. WO2021/255139, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2030200-6 (SE), filed on Jun. 17, 2020.
Prior Publication US 2023/0220715 A1, Jul. 13, 2023
Int. Cl. E05F 15/41 (2015.01); E05F 15/67 (2015.01)
CPC E05F 15/41 (2015.01) [E05F 15/67 (2015.01); E05Y 2201/408 (2013.01); E05Y 2201/434 (2013.01); E05Y 2201/684 (2013.01); E05Y 2201/716 (2013.01); E05Y 2201/724 (2013.01); E05Y 2400/302 (2013.01); E05Y 2400/36 (2013.01); E05Y 2400/40 (2013.01); E05Y 2400/44 (2013.01); E05Y 2400/52 (2013.01); E05Y 2600/46 (2013.01); E05Y 2900/106 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method at a control device for controlling an overhead door operator system, the overhead door operator system being configured for opening and closing an opening, the overhead door operator system comprising:
a door frame comprising a first frame section at a first side of the opening and a second frame section at a second side of the opening opposite the first side;
a door arranged to be moved between an open (O) and closed (C) position, the door being movably connected to the door frame;
a drive unit mounted on the door, the drive unit comprising at least one motor arranged to move the door from the closed position (C) to the open position;
a first detection unit arranged at the door in connection to the first side to detect door movement in connection with the first side;
a second detection unit arranged at the door in connection to the second side so as to detect door movement in connection to the second side;
a first elongated transmission member extending along the first side of the opening and the first frame section; and
a second elongated transmission member extending along the second side of the opening and the second frame section,
wherein the drive unit further comprises a first driven transmission member in driving connection with the motor, the first driven transmission member being movably connected to the first elongated transmission member and arranged to interplay with said first elongated transmission member for driving the first driven transmission member along said first elongated transmission member by means of the first elongated transmission member and wherein the drive unit further comprises a second driven transmission member in driving connection with the motor and arranged to interplay with the second elongated transmission member, so as to move the door between the closed (C) and open (O) position, the method comprising the steps of:
receiving one or more first signals from the first detection unit associated with movement of the door in connection to the first side and one or more second signals from the second detection unit associated with movement of the door in connection to the second side;
comparing the first signals associated with door movement in connection to the first side with the second signals associated with door movement in connection the second side, determining whether or not the thus detected door movement is related to an unexpected door movement if a difference between the first and second signals exceeds a certain threshold; and
if it is determined that detected door movement is related to an unexpected door movement, taking action so as to prevent more extensive damages.